straight and made up of 2 points, has definite ending and beginning, named by using the endpoints only, always use 2 letters to name a segment
Back
noncollinear points
Front
don't lie on same line
Back
theorms
Front
facts/rules about geometry that have been proven true
Back
point
Front
named by using a capital letter
Back
ray
Front
straight line made up of points, has begging but no end, starting point of this is called an endpoint, name using the endpoint first and another point on it.
Back
plane
Front
2 dimensions, extends without end in all directions, takes at least 3 noncollinear points, named with a single uppercase script letter or by 3 noncollinear points.
Back
ruler postulate
Front
the distance between 2 points is the absolute value of the difference of the coordinates of the points
Back
line
Front
named with a single lowercase cursive letter or by any two points on it
Back
coplaner
Front
lie on the same plane
Back
congruent segments
Front
segments that have the same length
Back
noncoplaner
Front
don't lie on the same plane
Back
midpoint formula
Front
Back
opposite rays
Front
have the same endpoint and extend in opposite directions
Back
collinear points
Front
lie on same line
Back
distance formula
Front
Back
angle addition postualte
Front
adding angles within one large angle to find the large angle
Back
segment addition postualte
Front
if b is between a and c, then ab+bc=ac
Back
segment bisector
Front
segment, ray, line, or plane that intersects a segment at its midpoint
Back
postulates
Front
facts about geometry that are accepted as true
Back
between
Front
a point is between 2 points only if the 3 pints are collinear